Potion magique

There are three potion ingredients (toad, flower, leaf), each of which comes in three colors (red, purple green). Players take turns to be Merlin and ask the other player to find out what's in a potion. The other player plays ingredient cards and Merlin has to tell how many ingredients were correct (Mastermind-style). The goal is to find out the exact recipe for three potions in as few attempts as possible.